#Google Authenticator Golang package This Golang package can be used to interact with the Google Authenticator mobile app for 2-factor-authentication. This package can generate secrets, generate codes and validate codes the secret.

For a secret installation you have to make sure that used codes cannot be reused (replay-attack).

#Usage:

 package main
 
 import (
   "flag"
   "fmt"
   "googleAuthenticator"
 )
 
 func createSecret(ga *googleAuthenticator.GAuth) string {
   secret, err := ga.CreateSecret(16)
   if err != nil {
   return ""
   }
   return secret
 }
 
 func getCode(ga *googleAuthenticator.GAuth, secret string) string {
   code, err := ga.GetCode(secret)
   if err != nil {
   return "*"
   }
   return code
 }
 
 func verifyCode(ga *googleAuthenticator.GAuth, secret, code string) bool {
   // 1:30sec
   ret, err := ga.VerifyCode(secret, code, 1)
   if err != nil {
     return false
   }
   return ret
 }
  
 func main() {
   flag.Parse()
   secret := flag.Arg(0)
   ga := googleAuthenticator.NewGAuth()
   fmt.Print(getCode(ga, secret))
 }